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(No Model.) 4 Sheets-Sheet 1.

H. P. F. EWERS. MACHINE FOR SBAMING TIN BOXES.

Patented Sept. 17

4 Sheets-Sheet 2.

(No Model.)

H, P. F. EWERS. MACHINE FOR SEAMING TIN BOXES. 110.411.1331. Patented Sept. 17, 188 9.

um m imyw zdfffam (No Model.) 4 Sheets-Sheet 3. H. P. F. EWERS.

MACHINE FOR SEAMING TIN BOXES. No. 411,331. Patented Sept 17, 1889.

(No Model.) 4 Sheets-Sheet 4.

H. P. F. EWERS.

MACHINE FOR SEAMING TIN BOXES.

No. 411,331. Patented Sept, 1'7, 1889..

u. PETERS, Photo-Lllhognphcr. Washington, D c.

UNITED STATES PATENT OFFICE.

I'IARTIVIG PETER FRIEDRICH EWVERS, OF LUBECK, GERMANY.

MACHINE FOR SEAMING TIN BOXES.

SPECIFICATION forming part of Letters Patent No. 411,331, dated September 17, 1889.

Application filed septcmber 15, 1888. Serial No. 235,536- (No model.) Patented in Germany October 25, 1886, No. 87,411, and January 15, 1387,110- 40,553.

new and useful Improvements in Machines for Seaming Tix Boxes, (for which I have obtained patents in Germany, No. 37,411, bearing date October 25, 1886, and No. 40,553, hearing date January 15,1887) of which the following is a specification.

This invention relates to a machine for seaming tin obj ectssuch as boxes, cases, &c.of round, oval, rectangular, or any other desirable shape. In this machine the periphery of the article to be seamed is conducted by a special contrivance to the tool and the seam made in it.

In the accompanying drawings, Figure 1 shows a side view of my machine. Fig. ,2 is a vertical longitudinal section of the machine.

Fig. 3 is a front view of the machine, some parts (frame A and hand wheel h) being shown in section. Fig. 4 is a horizontal section showing portions of the machine in detail, taken on the line C O of Fig. 1. Fig. 5 is another horizontal section of the machine on the line D D, Fig. 1. Fig. 6 shows a modification of the contrivance specially intended for seaming round tin articles. 7 shows a view of the contrivance of Fig. 6 when seen from above. Figs. 8 to 10 illustrate some tools in different shapes and positions and in their different ways of working. Fig. 8 shows a rotating tool for bending the edge of the bottom round that of the bodythat is to say, for the production of a simple seam. Fig. 8 shows in section the box and lid parts put together before being seamed. Fig. 8 shows the lid seamed around the box part. Fig. 9 illustrates a tool for binding down the double seam. Fig. 9 shows the seam made by the action of the roller of Fig. 11 on the seam of Fig. 10. Fig. 10 is a tool for bending the double seam round. Fig. 10 shows the flange bent round and the seam completed.

This machine, the several parts of which are more fully described hereinafter, works in such a way that the object to be seamed is fixed between two clamping plates or chucks, so that it must follow the direction of the chucks. The under one of these two chucks is led on a rail or guide, so that the tool (of which one or more are attached to a disk and are adjustable in a vertical and horizontal direction) presses against the edge of the metal object that has to be seamed, and by doing so forms a scam in the edge of the metal object when in motion.

The machine consists of the following principal parts: The tool-holder, with its driving contrivance; the chucks that hold the object to be seamed, together with the driving mechanism for them; the contrivances by means of which the chucks are guided, and, finally, the frame of the machine, which combines the separate driving mechanism into a whole.

A is the frame of the machine; B, the table on which the tool-holder, with the tool and the under chuck, is arranged; and O is the metal object to be seamed.

The tools, which are in the shape of rollers, may be of different designs, and are fastened to the periphery of a rotatable disk. If several tools are in use, they are setin motion successively. The disk at is mounted so as to rotate on the carriage (Z, and can be held in a certain position by means of a pin 1) at the end of the lever c, which works into a corresponding hole (1' in the carriage d. The pin 1) is pressed downward by a spring 0 that presses against the under side of the lever c, pivotedlon the pin 0, held in the lugs 0 The carriage (Z is supported on the table (Z having ways therefor and fastened to the vertical shaft 6, which is provided with teeth f on one side. The cog-wheel c, which is journaled in boxes or collars cast on the table B, and whose shaft g has ahand-wheel h at one end, meshes with the teeth. The hand-wheel h is provided on its periphery with teeth h, (see Fig. 3,) with which engages a pawl 7L2, which is fastened by means of pivot-pin 72, to the table B. By turning this wheel h in either one or the other direction the table B can be brought into a higher or lower position, in

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by the wheel 7' in either the one or the other direction, and the carriage d is thus moved in a horizontal direction on the table d in such a way that it is brought either closer to or farther from the chucks 7c and k. The two chucks serve to hold fast the metal object to be seamed. They have an outer shape in conformity with the metal object, either oval, round, or not, or any desirable shape, and are pressed hard against the vessel to be seamed by means of a contrivance to be described hereinafter. The object to be seamed gets its forward motion in the direction of the tool from the under chuck 7t, which is provided on its periphery with cogs Z. The chucks are hollow and their inner surfaces press against the friction-rollers n n, which thus form an abutment therefor. The frictionroller n for the under chuck rotates on a pivot 0, projecting from table 13, and the frictionroller n for the upper chuck rotates on a pivot 0, projecting from plate 19. The

friction-rollers thus form a powerful resistance for the chucks 70 when the tools bear against the edge or border of the metal object. The bottom of the chuck 7c below its teeth presses with its periphery against the rail m. This rail is fastened to the table B and forms the outer guide for the under chuck. A cog-wheel 'u, fastened to the shaft t, meshes with the outer teeth Z on the under chuck. On turning the wheel 1 the shaft tis set in motion by the bevel-wheels s s from the horizontal driving-shaft q, and in consequence of this the wheel a is turned. The result of this is that the under chuck is set in motion. and in such a way as to make it slide as its shape may happen to be along the guide m. In consequence of this the whole periphery of the metal obj cct to be seamed is gradually brought to bear against the tools. Owing to the pressure with which the upper chuck k bears against the metal Object it acquires the same motion as the under one.

Owing to the arrangement of the cog-wheel u and the guide-rail m on the outer side of the chuck it, and on account of the rollers n n inside of the chucks 7.: 7c, the latter cannot perform any other motion than the one prescribed; or, in other words, they are obliged to conduct the edge of the metal object to be seamed past the point where the tool comes into action.

By means of the plate p, on the stud o of which the roller 71/ rotates, the upper chuck k is pressed against the object to be seamed. The plate or disk 13 is always held by the Vertical shaft '0 in an exactly horizontal position and parallel to the table B. The shaft 11 is provided with teeth 1;, with which the cogwheel 20 meshes. The latter is wedged fast on the shaft. w, and is journaled between two blocks 10 on the framing 0c. The shaft Z0" is turned by means of the hand-wheel y, and the shaft '0 thus raised and lowered. The wheel 'y is provided round its periphery with ratchet-teeth y, with which engages the pawl 1 which is pivoted at g by means of the pivot g This pawl serves to hold the shaft 1) in any position given it by the turning of the wheel y. The shaft uis connected at its upper end by the pivot-pin 2 with a lever z. The lever 2 has its fulcrum at .2 in a bracket 2 on the standard 00, and is weighted at its other end by a weight 2', which may be adjusted by a pin or screw e By means of this weighted lever the shaft 4) is continually pressed downward.

In order to raise the shaft '0 and overcome the weight of the lever z, a pedal 2 is applied. It has its fulcrum at z" in the frame A of the machine, and its free end is provided with a fork having slots 2', in which works a pin 2 fastened to the vertical bar .2 The bar z passes through eyes 2 and it presses from below against the lever 2 as soon as the pedal .23 is depressed. This causes the shaft Q) to rise. The upper chuck is freed thereby and a new metalobject may be placed between the chucks.

In Figs. 8 to 10 some tools for seaming tin objects are represented. Other tools of any desirable shape and construction may, however, be used for the purpose. Fig. 8 shows a tool for bending the bottom edge round the body edge, Fig. S for making a so-called simple seam therefor, Fig. 8 Fig. 9 represents a tool for bending the simple seam into the shape of Fig. 9. Fig. 10 shows one for bending round the seam, Fig. 9, into the shape given in Fig. 10, with a view to forming a double seam.

The shape of the chuck is dependent on the shape of the objects to be seamed. If the latter is not round, the chucks are not round either; but if the object is of a round shapesay cylindrical, for instance-the chucks must be cylindrical, too. In the latter case the pivot 0 of roller a 011 the inside of the lower chuck 70 can be replaced by a pivot k Figs. 6 and 7. The pivot is applied axially to the modified under round chuck 70 and either j ournaled so as to rotate in the table B orelse screwed into the table to form the pivot for the under and round chuck 70 which is provided with peripheral teeth 1. In this case the application of a guide-rail m for guiding the under chuck is not necessary. The under and round chuck is operated through the medium of intermediate pinion a, which is fastened to the table and meshes with pinion u, as shown in Figs. 6 and '7.

Having thus described my invention, what I claim is 1. In a seaming-machine, the combination, with the seaming tool or tools, of two hollow chucks having plain inner walls and similar in shape on the outside to the object to be seamed, which is clamped between them, guide-rollers bearing on the plain inner sides of said chucks, and means for operating the chucks, substantially as set forth.

2. In a seaming-machine, the combination,

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with the seaming tool or tools, of two hollow chucks between which the object to be seamed is clamped, guide-rollers bearing on the inner sides of said chucks, a guide-rail against which the lower edge of the lower chuck bears, and means for operating the chucks, substantially as set forth.

3. In a seaming-machine, the combination, with the seaming tool or tools, of upper and lower hollow chucks between which the object to be seamed is clamped, guide-rollers bearing on the inner sides of said chucks, a guiderail against which the lower edge of the lower chuck bears, which latter is provided with cog-teeth, a pinion meshing with said teeth, and suitable mechanism for revolving said pinion, substantially as set forth.

ing the tool-carrier in position, substantially I as set forth.

In witness whereof I have hereunto set my hand, at Liibeck, June 26, 1888, in presence of two witnesses.

HARTWIG PETER FRIEDRICH EWERS.

lVitnesses:

AUG. Bose, J. N. STOLTERFOH. 

